package com.itbaima.config;

import com.itbaima.json.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class WebConfig extends WebMvcConfigurationSupport {



    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        // 处理静态资源
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
        registry.addResourceHandler("/public/**").addResourceLocations("classpath:/public/");

    }

    /**
     * 扩展Spring MVC框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建一个消息转换器对象
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();

        //需要为消息转换器设置一个对象转换器，对象转换器可以将Java对象序列化为json对象
        converter.setObjectMapper(new JacksonObjectMapper());

        //将自己的消息转化器加入容器中 ( 顺序 ， 加入的转换器)
        converters.add(0,converter);


    }
}
